Mercy mercy me: In memory of Marvin Gaye

Mercy Mercy Me by Marvin Gaye

Oh, mercy mercy me
Oh, things ain't what they used to be
No, no
Where did all the blue sky go?
Poison is the wind that blows
From the north, east, south, and sea
Oh, mercy mercy me
Oh, things ain't what they used to be
No, no
Oil wasted on the oceans and upon our seas
Fish full of mercury
Oh, mercy mercy me
Oh, things ain't what they used to be
No, no
Radiation in the ground and in the sky
Animals and birds who live nearby are dying
Oh, mercy mercy me
Oh, things ain't what they used to be
What about this overcrowded land?
How much more abuse from man can you stand?
My sweet Lord
My sweet Lord
My sweet Lord
(released May 21, 1971, less than 1 month before the birth date of Tupac Amaru Shakur)

I don't really feel the need to explain his lyrics. A simple google search on, say, 'mercury + seafood' or 'radiation' will illuminate any questions as to the face value of the lyrics herein.
And that is what I appreciate most about this song; Simplicity of expression and depth of meaning.

God rest your soul, Marvin. Music has benefited from your works greatly. Thank you.